' )
.appendTo( $( document.body ) ),
bs = this,
viewer,
message;
if ( $dummy.css( 'display' ) === 'inline' ) {
// Let's be clean and remove the test item before resolving the deferred
$dummy.remove();
try {
viewer = bs.getViewer();
} catch ( e ) {
message = e.message;
if ( e.stack ) {
message += '\n' + e.stack;
}
deferred.reject( message );
return;
}
deferred.resolve( viewer );
} else {
$dummy.remove();
setTimeout( function () { bs.isCSSReady( deferred ); }, this.readinessWaitDuration );
}
};
/**
* Processes all thumbs found on the page
*/
MMVB.processThumbs = function () {
var bs = this;
// if this breaks in IE8, see https://github.com/ebryn/backburner.js/pull/50
// but it probably won't since there is a catch further up the chain
try {
this.$thumbs.each( function ( i, thumb ) {
bs.processThumb( thumb );
} );
} finally {
this.thumbsReadyDeferred.resolve();
// now that we have set up our real click handler we can we can remove the temporary
// handler added in mmv.head.js which just replays clicks to the real handler
$( document ).off( 'click.mmv-head' );
}
};
/**
* Check if this thumbnail should be handled by MediaViewer
* @param {jQuery} $thumb the thumbnail (an `
![]()
` element) in question
* @return {boolean}
*/
MMVB.isAllowedThumb = function ( $thumb ) {
// .metadata means this is inside an informational template like {{refimprove}} on enwiki.
// .noviewer means MediaViewer has been specifically disabled for this image
// .noarticletext means we are on an error page for a non-existing article, the image is part of some
// template // FIXME this should be handled by .metadata
return $thumb.closest( '.metadata, .noviewer, .noarticletext' ).length === 0;
};
/**
* Processes a thumb
* @param {Object} thumb
*/
MMVB.processThumb = function ( thumb ) {
var bs = this,
alwaysOpen = false,
$thumb = $( thumb ),
$link = $thumb.closest( 'a.image' ),
$thumbContain = $link.closest( '.thumb' ),
$enlarge = $thumbContain.find( '.magnify a' ),
title = mw.Title.newFromImg( $thumb ),
link = $link.prop( 'href' );
if ( !bs.validExtensions[ title.getExtension().toLowerCase() ] ) {
return;
}
if ( !bs.isAllowedThumb( $thumb ) ) {
return;
}
if ( $thumbContain.length !== 0 && $thumbContain.is( '.thumb' ) ) {
// If this is a thumb, we preload JS/CSS when the mouse cursor hovers the thumb container (thumb image + caption + border)
$thumbContain.mouseenter( function() {
// There is no point preloading if clicking the thumb won't open Media Viewer
if ( !bs.config.isMediaViewerEnabledOnClick() ) {
return;
}
bs.preloadOnHoverTimer = setTimeout( function() {
mw.loader.load( 'mmv' );
}, bs.hoverWaitDuration );
} ).mouseleave( function() {
if ( bs.preloadOnHoverTimer ) {
clearTimeout( bs.preloadOnHoverTimer );
}
} );
}
if ( $thumb.closest( '#file' ).length > 0 ) {
// This is a file page. Make adjustments.
link = $thumb.closest( 'a' ).prop( 'href' );
$( '
' )
.append(
$link = $( '' )
// It won't matter because we catch the click event anyway, but
// give the user some URL to see.
.prop( 'href', $thumb.closest( 'a' ).prop( 'href' ) )
.addClass( 'mw-mmv-view-expanded' )
.text( mw.message( 'multimediaviewer-view-expanded' ).text() )
)
.appendTo( $( '.fullMedia' ) );
// Ignore the preference, open anyway
alwaysOpen = true;
}
// This is the data that will be passed onto the mmv
this.thumbs.push( {
thumb : thumb,
$thumb : $thumb,
title : title,
link : link,
caption : this.findCaption( $thumbContain, $link ) } );
$link.add( $enlarge ).click( function ( e ) {
return bs.click( this, e, title, alwaysOpen );
} );
};
/**
* Finds the caption for an image.
* @param {jQuery} $thumbContain The container for the thumbnail.
* @param {jQuery} $link The link that encompasses the thumbnail.
* @returns {string|undefined} Unsafe HTML may be present - caution
*/
MMVB.findCaption = function ( $thumbContain, $link ) {
var $thumbCaption;
if ( $thumbContain.length !== 0 && $thumbContain.is( '.thumb' ) ) {
$thumbCaption = $thumbContain.find( '.thumbcaption' ).clone();
$thumbCaption.find( '.magnify' ).remove();
if ( !$thumbCaption.length ) { // gallery, maybe
$thumbCaption = $thumbContain
.closest( '.gallerybox' )
.not( function () {
// do not treat categories as galleries - the autogenerated caption they have is not helpful
return $thumbContain.closest( '#mw-category-media' ).length;
} )
.find( '.gallerytext' )
.clone();
}
return this.htmlUtils.htmlToTextWithLinks( $thumbCaption.html() || '' );
} else if ( $link.prop( 'title' ) ) {
return $link.prop( 'title' );
}
};
/**
* Handles a click event on a link
* @param {HTMLElement} element Clicked element
* @param {jQuery.Event} e jQuery event object
* @param {string} title File title
* @param {boolean} overridePreference Whether to ignore global preferences and open
* the lightbox on this click event.
* @returns {boolean}
*/
MMVB.click = function ( element, e, title, overridePreference ) {
var $element = $( element );
// Do not interfere with non-left clicks or if modifier keys are pressed.
if ( ( e.button !== 0 && e.which !== 1 ) || e.altKey || e.ctrlKey || e.shiftKey || e.metaKey ) {
return;
}
// Don't load if someone has specifically stopped us from doing so
if ( !this.config.isMediaViewerEnabledOnClick() && overridePreference !== true ) {
return;
}
// Don't load if we already tried loading and it failed
if ( this.viewerIsBroken ) {
return;
}
mw.mmv.durationLogger.start( [ 'click-to-first-image', 'click-to-first-metadata' ] );
if ( $element.is( 'a.image' ) ) {
mw.mmv.actionLogger.log( 'thumbnail' );
} else if ( $element.is( '.magnify a' ) ) {
mw.mmv.actionLogger.log( 'enlarge' );
}
this.loadViewer().then( function ( viewer ) {
viewer.loadImageByTitle( title, true );
} );
e.preventDefault();
return false;
};
/**
* Handles the browser location hash on pageload or hash change
* @param {boolean} log Whether this is called for the hash that came with the pageload
*/
MMVB.hash = function ( initialHash ) {
var bootstrap = this;
// There is no point loading the mmv if it isn't loaded yet for hash changes unrelated to the mmv
// Such as anchor links on the page
if ( !this.viewerInitialized && window.location.hash.indexOf( '#mediaviewer/') !== 0 ) {
return;
}
if ( this.skipNextHashHandling ) {
this.skipNextHashHandling = false;
return;
}
this.loadViewer().then( function ( viewer ) {
viewer.hash();
// this is an ugly temporary fix to avoid a black screen of death when
// the page is loaded with an invalid MMV url
if ( !viewer.isOpen ) {
bootstrap.cleanupOverlay();
} else if ( initialHash ) {
mw.mmv.actionLogger.log( 'hash-load' );
} else {
mw.mmv.actionLogger.log( 'history-navigation' );
}
} );
};
/**
* Handles hash change requests coming from mmv
* @param {jQuery.Event} e Custom mmv-hash event
*/
MMVB.internalHashChange = function ( e ) {
var hash = e.hash,
title = e.title;
// The advantage of using pushState when it's available is that it has to ability to truly
// clear the hash, not leaving "#" in the history
// An entry with "#" in the history has the side-effect of resetting the scroll position when navigating the history
if ( this.browserHistory && this.browserHistory.pushState ) {
// In order to truly clear the hash, we need to reconstruct the hash-free URL
if ( hash === '#' ) {
hash = window.location.href.replace( /#.*$/, '' );
}
this.browserHistory.pushState( null, title, hash );
} else {
// Since we voluntarily changed the hash, we don't want MMVB.hash (which will trigger on hashchange event) to treat it
this.skipNextHashHandling = true;
window.location.hash = hash;
}
document.title = title;
};
/**
* Instantiates a new viewer if necessary
* @returns {mw.mmv.MultimediaViewer}
*/
MMVB.getViewer = function () {
if ( this.viewer === undefined ) {
this.viewer = new mw.mmv.MultimediaViewer();
this.viewer.setupEventHandlers();
}
return this.viewer;
};
/**
* Listens to events on the window/document
*/
MMVB.setupEventHandlers = function () {
var self = this;
$( window ).on( this.browserHistory && this.browserHistory.pushState ? 'popstate.mmvb' : 'hashchange', function () {
self.hash();
} );
// Interpret any hash that might already be in the url
self.hash( true );
$( document ).on( 'mmv-hash', function ( e ) {
self.internalHashChange( e );
} ).on( 'mmv-cleanup-overlay', function () {
self.cleanupOverlay();
} );
};
/**
* Cleans up event handlers, used for tests
*/
MMVB.cleanupEventHandlers = function () {
$( window ).off( 'hashchange popstate.mmvb' );
$( document ).off( 'mmv-hash' );
};
/**
* Sets up the overlay while the viewer loads
*/
MMVB.setupOverlay = function () {
var $scrollTo = $.scrollTo(),
$body = $( document.body );
// There are situations where we can call setupOverlay while the overlay is already there,
// such as inside this.hash(). In that case, do nothing
if ( $body.hasClass( 'mw-mmv-lightbox-open' ) ) {
return;
}
if ( !this.$overlay ) {
this.$overlay = $( '' )
.addClass( 'mw-mmv-overlay' );
}
this.savedScroll = { top : $scrollTo.scrollTop(), left : $scrollTo.scrollLeft() };
$body.addClass( 'mw-mmv-lightbox-open' )
.append( this.$overlay );
};
/**
* Cleans up the overlay
*/
MMVB.cleanupOverlay = function () {
var bootstrap = this;
$( document.body ).removeClass( 'mw-mmv-lightbox-open' );
if ( this.$overlay ) {
this.$overlay.remove();
}
if ( this.savedScroll ) {
// setTimeout because otherwise Chrome will scroll back to top after the popstate event handlers run
setTimeout( function() { $.scrollTo( bootstrap.savedScroll, 0 ); bootstrap.savedScroll = undefined; }, 0 );
}
};
MMVB.whenThumbsReady = function () {
return this.thumbsReadyDeferred.promise();
};
mw.mmv.MultimediaViewerBootstrap = MultimediaViewerBootstrap;
}( mediaWiki, jQuery ) );